Lasting-jack



(No Model.)

- S. D. TRIPP.

LASTING JACK.

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Patented Feb. 21, 1888;

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SETH D. TRIPP, OF LYNN, MASSACHUSETTS.

LASTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 378,118, dated February 21, 1888.

Application filed December 2, 1887. Serial No. 256,791. {No model.)

To all whom, it may concern.-

Be it known that I, SETH D. TRIPP, of Lynn, county of Essex, State of Massachusetts, have invented an Improvement in Lasting-Jacks, of which the followingdescription, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

Boots and shoes in their manufacture are commonly held to be lasted by a jack, it having a rigid pin to enter ahole or socket in the last. it frequently happens that the hole or socket in the last in which the supporting-pin is to be inserted is not perfectly true or perpendicular, but is inclined or oblique, so that when the last is placed upon the supportingpin the latter will not fully enter the hole or socket, and as a result thereof the bottom of the last cannot bebrought to the properlevcl, but will be higher at one than atits other end, and also one side of the last will be higher than the other side.

In machines for leveling the soles of boots and shoes, substantially such as shown and describedininyUnited States PatentNo. 296,l86, dated April S, 1884, it is essential that thelast be so supported that its bottom may be brought to the desired level both in the direction of its length and width.

It is the object of this invention to provide a jack with a supporting-pin so constructed, as will be described, that the said pin may be fitted into and aceoinmodateitself to the socket of the last, whether itbe inclined or perpendicular, so that when the last is applied to the jack and pressure is applied to the shoe the heel and toe portions of the said last are free i to be brought to substantially a true level.

In many forms of jacks the construction of the supportingpin is such that when the last is being clamped upon the toe-rest by the movement of the pin the last is drawn or moved forward longitudinally, which is very objectionable, especially in a machine of the class referred to, wherein the position of the last should always be the same in order to correctly cooperate with the other parts.

My improved jack is shown as provided with a concaved heel-clamp, which determines the longitudinal position of the last when the same is being clamped to the toe-rest.

The last-holding pin in my invention has a ball-like head, which enters loosely asocket in an upright pivoted bar, which is acted upon by a screw during the operation of clamping the last with the upper thereon to the toe-rest, the last holding pin at such time tipping to enable the last to adapt itself freely to the position determined by the heel-clamp and the toercst.

My invention therefore consists, essentially, in a last-supporting pin having a ball-shaped end, combined with a rod or bar having an elongated socket and with a locking device to secure the ball-shaped pin in its socket, substantially as will be described, to receive the ball of the pin.

Other features of my invention will be pointed out in the claims at the end of this specific cation.

Figure 1 is a side elevation of a lasting-jack provided with in y improved last-supporting pin and heel-clamp; Fig. 2, a sectional detail on line so or, 1; and Figs. 3 and 4, details to be referred to.

The lasting-jack, as herein shown, is composed of a hollow standard, A, having arms A A, which support, respectively, a heelclamp, a, and a toe-rest, a. The toe-rest is connected to the arm A by asetscrew, a", and pin (i The heel-clamp is held in place by a pin, as h, extended through a hub, It, and the said clamp and toe-rest will in practice have each a facing of leather or other cushioning material.

The hollow standard A has extended into it between the arms A A arod or bar, I), having its upper end slotted transversely, as shown, to form ears b b which are concaved at their inner sides to leave an elongated socket for the reception of the rounded or ball-shaped end I) of the last-supporting pin b". (Shown separately in Fig. 2.) The ball-shaped end I) of the pin 1)" is locked in its socket, as shown, by end pieces, I) b, fitted into slots between the cars 12 b.

The last-supporting pin b is made somewhat snlallcr in cross-section than the distance between the cars 6 I)", to thus permit the said pin to tip or move somewhat to either side of the longitudinal center of the socket, and the length of the socket permits the said pin to move to either side of the transverse center of the said socket, so that the last-holding pin may be extended into the usual. hole or socket in the heelof the last its entire length, or to the bottom of the said hole or socket, even when the said hole or socket is made inclined or oblique, or not perfectly true or perpendicular.

The last-holding pin I), as-shown in Fig. 1, has fitted upon it loosely a block or rest, 0, upon which bears the heel or rear portion of the last 0.

The rod or bar b may be raised and lowered, as herein shown, by an eccentric, 0 on a shaft, 0 supported in the hollow standard A, the lower end of the rod 1) being slotted to be fitted on the shaft 0 and having a shoulder, c", resting upon the eccentric 0 by which the rod is supported.

The shaft 0" is herein shown as provided out side the standard with a locking device consisting of, as shown, awheel, 0 having notches c, with which cooperates a pawl or dog, 0 to lock the saidwheel and prevent rotation of the shaft 0, and consequently movement of the bar b. The bar I; may be moved forward and backward bodily, the forward movement being limited, as shown, by a screw, 41.

When the last and shoe thereon are to be applied and held firmly in the jack with the heel of the last in a position longitudinally defined by the position of the heel-clamp a, the screw d is turned to act against and force the bar b toward the arm A. During such move ment of the bar I) the toe portion of the last is forced snugly against the toe-rest, and at the same time the pin 2) tips to enable the last to seat itself correctly upon the toe-rest and fit the heel-clamp.

By reason of the ballshaped pin and the oblong socket in which it enters, the last with the sole thereon, when subjected to pressure in a beating-out or leveling machine, is free to tip or rock somewhat transversely or sidewise with relation to the length of the last.

I claim-- 1. In ajack, a last-supporting pin having a ball-shaped end, combined with a rod or bar having an elongated socket to receive the ball of the pin, and with alocking device to secure said ball-shaped pin in its socket, substantially as and for the purpose set forth.

2. In a jack, a hollow standard, A, a shaft, 0 a bar or rod, I), having ears 7) b concaved to form an oblong socket, combined with a last-holding pin, If, having a ball-shaped end fitted loosely within the said socket, as and for the purpose specified.

3. In a jack, a hollow standard, A, a shaft, 0, a bar or rod, 1), having ears b If, concaved to form an oblong socket, combined with a last-holding pin, 1), having a ball-shaped end fitted loosely within the said socket, and with a locking device, substantially as described, to secure the ball-shaped pin in its socket, substantially as described.

4. In a jack, a hollow standard, a bar or rod having ears b I)", concaved to form an oblong socket, a pin having a ball-shaped end fitted into said socket, combined with a shaft, a and a locking device to prevent rotation of said shaft, substantially as described.

5. The heelclamp and toe'rest, and the bar I) and pivoted pin mounted thereon, combined with means, substantially as described, to force the said bar toward the heel clamp, to operate substantially as described.

In testimony whereof Ihave signed my name to this specification in the presence of two sub scribing witnesses.

SETH DJTRIPP.

Vitnesses:

G. XV. GREGORY, B; DIE-WAR. 

